So far playing with it for a few days now I have only found one bug in the software.

When someone calls me and I can't take the call at that moment I'm used to pushing 'end' and the phone will stop ringing and place it as a missed call, however since the upgrade when I push end it stops the ringing for a second then it starts again.

I thought it might have been something a battery pull could fix however it apparently isn't since it happened again today.

May I humbly suggest that if you are having problems with the OS version not supported by your carrier that you wipe the BB out and put the latest version of their OS on it. Then you can get support for it.

T-Mobile should have their supported version of 4.1 out soon; maybe even next week.

don't know if it's really a bug but, before I updated I went to the cnet test site (for bandwidth) that's over on hofo...and got a reading of 290 kbps...when I updated...I couldn't complete the test (same browser settings)

I've noticed a couple of things since I loaded the 4.1 code onto my 7250:

1) In the Messages app, I can no longer select multiple items and toggle between Opened and Unopened by pressing [ALT]+U. If I click the scroll and selecte Mark Unopened from the menu it will do multiples and [ALT]+U still works for single items.

2) In the phone app under 4.0 when the cursor was scrolled down into the names list I was able to select a name to dial by typing the beginning of that name. Under 4.1 I can only dial by number within the Phone app. In order to dial be name I must choose "Call from Address Book" from the menu.

I've noticed a couple of things since I loaded the 4.1 code onto my 7250:

1) In the Messages app, I can no longer select multiple items and toggle between Opened and Unopened by pressing [ALT]+U. If I click the scroll and selecte Mark Unopened from the menu it will do multiples and [ALT]+U still works for single items.

2) In the phone app under 4.0 when the cursor was scrolled down into the names list I was able to select a name to dial by typing the beginning of that name. Under 4.1 I can only dial by number within the Phone app. In order to dial be name I must choose "Call from Address Book" from the menu.

In #2, its probably geared towards BBs that have Send/End keys. If you hold the Send key it automatically gets you the the Address book so you can type the contact name.

I installed 4.1 yesterday, all looks good so far. Only having problems with some 3rd party apps. Google Local scroll keys not working, but wheel does. Notifire not working on address entries, custom works right. Bluetooth services include headset, handsfree, desktop connectivity, wireless bypass.
My real reason for install was Bluetooth connect to desktop and that works.